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برآورد احتمال معاملات آگاهانه تعدیل شده؛ مطالعه موردی بخش مالی | ||
| مدلسازی اقتصادسنجی | ||
| مقاله 2، دوره 9، شماره 2 - شماره پیاپی 34، تیر 1403، صفحه 35-67 اصل مقاله (1.42 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/jem.2024.31495.1863 | ||
| نویسندگان | ||
| رضا طالبلو؛ پریسا مهاجری* | ||
| دانشیار اقتصاد، گروه اقتصاد نظری، دانشکده اقتصادی، دانشگاه علامه طباطبائی | ||
| تاریخ دریافت: 22 مرداد 1402، تاریخ بازنگری: 07 اردیبهشت 1403، تاریخ پذیرش: 07 اردیبهشت 1403 | ||
| چکیده | ||
| سطح عدم تقارن اطلاعات در بازارهای مالی تأثیر بسیاری بر تشکیل بازار، قیمت سهام و ریسک سرمایهگذاری دارد. علاوه بر این، طراحی سیاست‌های بهینه به ویژه اعمال محدودیت‌های معاملاتی توسط سیاستگذاران و تعیین استراتژی معاملاتی توسط معامله‌گران مستلزم آگاهی از میزان عدم تقارن اطلاعات است. در مقاله حاضر با استفاده از مدل احتمال معاملات آگاهانه (PIN) و احتمال معاملات آگاهانه تعدیل شده (AdjPIN) در چارچوب ریزساختار بازار مالی، میزان عدم تقارن اطلاعات در 69 شرکت فعال در حوزه واسطه‌گری مالی طی دوره 1396:1 تا 1402:3 برآورد می‌شود. طبق یافته‌ها، اولاً متوسط عدم تقارن اطلاعات طبق معیارهای PIN و AdjPIN به ترتیب 26 و 21 درصد بوده است. ثانیاً عدم تقارن اطلاعات در سال 1399 و به موازات با شکل‌گیری حباب در بازار سهام در تمامی زیربخش‌های مالی به شدت افزایش یافته است. ثالثاً بخش‌های بانک و سرمایهگذاری (با سهم 11 درصدی از ارزش بازار سهام)، عدم تقارن اطلاعات کمتری را در مقایسه با بخش‌های بیمه و لیزینگ (با سهم 5/0 درصدی از ارزش بازار سهام) تجربه نموده‌اند. رابعاً احتمال معاملات آگاهانه در شرکت‌های بزرگ (نظیر بانک تجارت، بانک ملت، بیمه ما، سرچشمه، لیزینگ سایپا) کمتر از شرکت‌های کوچک (نظیر بانک دی، بیمه کارآفرین، سرمایهگذاری کوثر بهمن، لیزینگ پارسیان) است. این یافته‌ها بر اهمیت درک عدم تقارن اطلاعات برای سیاستگذاری مؤثر و تصمیمات سرمایهگذاری در بازارهای مالی تأکید می‌کنند. | ||
| کلیدواژه‌ها | ||
| ریزساختار بازار مالی؛ احتمال معاملات آگاهانه (PIN)؛ احتمال معاملات آگاهانه تعدیل یافته (Adj-PIN)؛ واسطه‌گری مالی | ||
| عنوان مقاله [English] | ||
| Estimating the Adjusted Probability of Informed Trading Model; the Case Study of Financial Sector | ||
| نویسندگان [English] | ||
| Reza Taleblou؛ Parisa Mohajeri | ||
| Associate Professor in Economics, Department of Economics, University of Allemeh Tabataba’i University | ||
| چکیده [English] | ||
| The level of information asymmetry in financial markets significantly influences market structure, stock prices, and investment risk. In addition, optimal policy design, particularly the implementation of trading constraints by regulators and the determination of trading strategies by traders, requires an awareness of the extent of information asymmetry. In this paper, using two models, Probability of Informed Trading (PIN) and Adjusted Probability of Informed Trading (AdjPIN), within the framework of financial market microstructure, we estimate the level of information asymmetry for 69 active companies in the financial intermediation sector during the period from 1396:Q1 to 1402:Q3. According to our findings, first, the average information asymmetry, as measured by PIN and AdjPIN, stands at 26% and 21% respectively. Second, information asymmetry surged notably in 2019, coinciding with the stock market bubble across all financial sub-sectors. Third, the banking and investment sectors, comprising 11% of stock market value, exhibit lower information asymmetry compared to the insurance and leasing sectors, which collectively contribute only 0.5% to the stock market value. Forth, large companies such as Bank Tejarat, Bank Mellat, Bimah Ma, Sarcheshme, and Saipa Leasing demonstrate lower probability of informed tradings compared to smaller counterparts like Bank Day, Bimah Karafarin, Kausar Bahman Investment, and Parsian Leasing. These findings underscore the significance of understanding information asymmetry for effective policy-making and investment decisions in financial markets. | ||
| کلیدواژه‌ها [English] | ||
| Financial Market Microstructure, Probability of Informed Trading (PIN), Adjusted Probability of Informed Trading (AdjPIN), Financial Intermediation | ||
| مراجع | ||
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